Shield structure for information technology equipments

Abstract

A shield structure for information technology equipments includes an opening part provided in a portion of the shield structure and a lid covering the opening part. A signal ground line is provided on a printed circuit board accommodated in the enclosure. An electric connection material extends between the lid and the signal ground line of the printed circuit board and has at least a surface formed by an electrically conductive material. The electric connection material is in contact with the signal ground line of the printed circuit board.

1. A shield structure for information technology equipments, comprising:
 a signal ground line provided on a printed circuit board accommodated in an enclosure for information technology equipments; 
 an opening part provided in a portion of said shield structure for information technology equipments; 
 a lid covering the opening part; 
 an electric connection material extending between said lid and said signal ground line of said printed circuit board and having at least a surface formed by an electrically conductive material; and 
 two connectors mounted on said printed circuit board close to each other so that two memory modules are connectable to the connectors, respectively, 
 wherein said electric connection material is in contact with said signal ground line of said printed circuit board, 
 said opening part is provided at a position corresponding to a position where said memory modules are connected to said two connectors, and 
 said signal around line is provided between said two connectors and extends longer than a length of said memory modules, and a width of said electric connection material, which has a plate-like shape and extends from said lid, is equal to a length of said signal ground line. 
 
   
   
     2. The shield structure for information technology equipments as claimed in  claim 1 , wherein at least one protruding tab is formed on one side of said lid so as to be inserted into an engaging part of said shield structure for information technology equipments, said electric connection material extends in a direction of insertion of said protruding tab, and said connectors on said printed circuit board extend in the direction of insertion. 
   
   
     3. The shield structure for information technology equipments as claimed in  claim 1 , wherein said electric connection material is a protruding part protruding on a backside of said lid and having at least a surface formed of an electrically conductive material. 
   
   
     4. The shield structure for information technology equipments as claimed in  claim 3 , wherein said lid has a structure in which a metal plate is applied to an entire backside including said protruding part. 
   
   
     5. The shield structure for information technology equipments as claimed in  claim 3 , wherein said lid has a structure in which conductive plating is applied onto an entire backside including said protruding part. 
   
   
     6. The shield structure for information technology equipments as claimed in  claim 3 , wherein only a part of said protruding part of said lid is in contact with said signal ground line. 
   
   
     7. The shield structure for information technology equipments as claimed in  claim 1 , wherein said electric connection material is a reinforcing material crossing said opening part of said shield structure for information technology equipments and having at least a surface formed of an electrically conductive material. 
   
   
     8. The shield structure for information technology equipments as claimed in  claim 7 , wherein said reinforcing material extends between said two connectors, and one end of said reinforcing material is in contact with said signal ground line on said printed circuit board. 
   
   
     9. The shield structure for information technology equipments as claimed in  claim 8 , wherein only a part of said reinforcing material is in contact with said signal ground line. 
   
   
     10. The shield structure for information technology equipments as claimed in  claim 7 , wherein said reinforcing material extends between said two connectors, and an electrically conductive elastic material is provided between said reinforcing material and said signal ground line on said printed circuit board. 
   
   
     11. The shield structure for information technology equipments as claimed in  claim 10 , wherein said electrically conductive elastic material is an electrically conductive gasket. 
   
   
     12. The shield structure for information technology equipments as claimed in  claim 10 , wherein said electrically conductive elastic material is a surface mount spring. 
   
   
     13. The shield structure for information technology equipments as claimed in  claim 1 , wherein said electric connection material is an electrically conductive material arranged between said two connectors and having at least a surface formed of an electrically conductive material, and opposite ends of said electric connection material are in contact with a backside of said lid and said signal ground line, respectively. 
   
   
     14. The shield structure for information technology equipments as claimed in  claim 13 , wherein said electrically conductive material is elastically deformable between said lid and said signal ground line. 
   
   
     15. The shield structure for information technology equipments as claimed in  claim 1 , wherein said signal ground line is an electrically conductive sheet material applied on an insulation film applied on said signal wiring formed on said printed circuit board between said two connectors, and the electrically conductive sheet material is electrically connected to a ground potential portion of said printed circuit board. 
   
   
     16. The shield structure for information technology equipments as claimed in  claim 15 , wherein said electrically conductive sheet material is a copper sheet.